the pentagon is not looking for a shooting war with the iranians. top officials are very clear about this. but what were the iranians up to? are they trying to send a signal of more aggressiveness over those critical oil shipping lanes? the pentagon, the obama administration can only let the iranians go so far. if they try this again, that's really the key question. it might have been an unmanned drone, but how far do you really let the iranians go in such a critical economic area, wolf? >> all right, barbara. i know you'll stay on top of this. thank you. let's get back to politics. right now president obama certainly owes his re-election to an extremely well-organized campaign. you know all about the rallies. you know about the political ads, the armys of volunteers. but you may not know very much about the campaign and how much it knew about you. you. our brian todd has been digging into the data crunching that helped the campaign tailor its winning strategy, data mining as it's called. >> right. >> it's a fascinating detail. explain to our viewer